Traffic Channel Definitions In analog systems, the traffic channels (or voice channels) are synonymous with the physical transceiver hardware. The nature of CDMA technology implies that the effective traffic carrying capacity of a CDMA carrier varies in accordance with the interference density in the band and also depends on various CDMA system parameters. From the … Read more
CDMA Handoff Defination,Types and Capacity Handoffs The TIA/EIA Interim Standard, Mobile Station – Base Station Compatibility Standard of Dual- Mode Wideband Spread Spectrum Cellular System (TIA/EIA/IS-95), states that a CDMA base station shall support three types of handoff processes. Which type of handoff used in cdma? CDMA to CDMA Hard Handoff A CDMA to CDMA … Read more
Three of India’s largest mobile networks have requested that a portion of the radio spectrum reserved for CDMA services be re purposed for use by the GSM networks. Bharti Airtel, Vodafone and Idea Cellular sent a joint letter to the Department of Telecoms. “We recommend that the 800 MHz spectrum band is harmonies with the international … Read more
The Reverse CDMA Channel is composed of Access Channels and Reverse Traffic Channels. These channels share the same CDMA frequency assignment. Each Traffic Channel is identified by a distinct user long code sequence and each Access Channel is identified by a distinct Access Channel long code sequence. The following figure shows as example of the … Read more
Here i write down on how Forward Channel works in CDMA ? and its Structure. The following figure shows an example of the code channels transmitted by a base station. Out of the 64 code channels available for use, the example depicts the Pilot Channel (always required), one Sync channel, seven Paging Channels (the maximum … Read more
Conventional Blocking formula and its Analysis for cdma. In AMPS and TDMA systems, voice/traffic channels are assigned to users as long as they are available. Given the required offered traffic, the Erlang B model is used to determine the number of traffic channels required to provide a predetermined grade of service. The Erlang B model … Read more
CDMA means all depedancy on power control here i write on Power Control Inaccuracy in cdma. Traffic capacity of CDMA systems is increased by implementing an appropriate power control scheme to equalize the performance of all subscribers in the system. The appropriate power control scheme reduces the interference to the other adjacent cells. The less … Read more
Sectorization gain can be somewhat of a misleading term. One could think of the sectorization gain as more of a reduction factor. For an omni site, the sectorization gain is one. With a sector site, one could initially try to multiply the resulting capacity of an omni site (or single sector) by the number of … Read more
Intra RAT HO events in LTE Below is the List and How Intra RAT HO events in LTE. Event A1 : Serving becomes better than threshold Event A2 : Serving becomes worse than threshold Event A3 : Neighbor becomes offset better than serving Event A4 : Neighbor becomes better than threshold Event A5 : Serving … Read more
How Handover Filtering by UE in LTE ? If the IE “Filter coefficient” is received the UE applies filtering of the measurements for that measurement quantity according to the formula below. This filtering is performed by the UE before UE event evaluation. The UE filters also the measurements reported in the IE “Measured results”. The … Read more